Power-transmission mechanism.



J. G. P. THOMAS. POWER TRANSMISSION MECHANISM.

APPLlcATloN FILED ocT. 24. 1910.

1,144,01 1 Patented J une 22, 1915.

2 SHEETS-SHEET I.

E v 5a' THE NORRIS PETERS Co.. PHOTU-LITHD., WASHINGION, D. C

1. P'. THOMAS.

PGWER TRANSMISSION MECHANISM.

APPLICATION FILED ocT.24. IsIo.

1,144,01 1 Patented June 22, 1915. l

-. 2 sIIEETsz-SHEET 2.

m ZZ

THE NURRIS PETERS Co.. PHOTU-LITHO.. WASHINGTUN. n. C.

I EnsrATEsPATENr orrron.

' JOHN GODFREY Pansy THOMAS, or HoLYwELL, warns@ To, Iall Ait may concern 'i Beit known that I, JOHN. GODFREY Parar i yTIrorL/is, a subject of ther King yof Great `useful' vImprovements in -P Britain, residing'at The .'Vicarage, Holywell, North Wales, "havefinvented new and ower- Transmission -Mechanism, of which the following is a' specification.

' "This invention relatesto an'arrangement of gearing in connection with crank shafts for 4the purposeof connecting the crank sha-ft to yother shafts. v The' invention may beapplied in order to fobtai'nvariable yspeedsV of revolutionl of the drivenfmemberjbut isy primarily designed for use in connection` with the electromechanical transmission of power on motor 4vehicles by such systems as -that described y 'f in my earlier Patent No. 948,436.

- yL Infessence. lthe invention consists of an epiycnlic ygearing. in which the sun wheels f are co-aXialfwith the crank shaft and the planetwheels with thel crank pin. For the purposeof` the systems ofelectromechanical wheelsfare connectedto twoseparate yshafts eachof which carries arovdynamo electric machine, orv in other casesthev sun wheel transmission of power-referred to, the sun s haftsare joined respectively to theroad jwheels androne dynamogelect'ric machine while the crank shaft carries a second dynamofelectric machine ;'but if the gearing is to be used konly asa change speed gear- .f ingfone ofthe shafts wouldl be connected With the, road wheels and -the Vother with means by which it could be held ystationary oriclutched to anotherv member of the gear-y ing, or. if` desiredI allowed to rotate freely.

'if In. the accompanyingy drawings the invention isillustrated in threedilferent forms n of construction.

F igure 1 shows a vcross section of the pre- `ferred form of gearing; Figs. v2 and 3 are external! elevations of two modifications Fig. 4 diagrammatically illustrates the' ap- Vplica'tion of .the Ypresent invention to the system described ji'n Y my earlier Patent f No.

. 948,436@ fFigvv diagrammatically illustrates y the .f application-of fthe present invention to the iisystem described in4 my earlier Patent A'enginedrivesf disksiB, l64, formed with crank disks.

`('JWElR-ll?RANSMISSIONv IVIECHANISM.

Specification of Letters Patent. Patented June 22, 1915,

Application filed October 24, 1910. Serial No. 588,757.

and d respectively. The sleeve lof Vdisk 63 for the two cylindersr operating alternately.

Of course if desired theremay be a single cylinder only or two orl four cylinders arranged on opposite sides of the crank shaft. Between the disks 63 and 67 are mounted the sun wheel m and the planet wheel g, there being only a single planet wheel. These pinions yare supported in ball bearings 72. The pinion g is secured to an aXle k7 3 passing through the crank pinv 69Vand bearing at itsl other endbetween the disks 64 and 68.the pinion k. This pinion gears with the sun wheel n also mounted in ball bearings 72 between the disks 64 and 68. The sunwheels m and n are secured'to their respective vshafts e and d vwhich 'in the electromechanical power transmission systems referred' to would carryA the armatures of the respective dynamo electric machines. 74 indicates a balance'weight secured kin the The construction shown in Fig. V2 is slightly" different. [The shafts e and d in o this case each carry 'one disk only 75 and 76, which are enlarged on one side to form balance weights, and on the other side kare united byfthecrank pin 77 Thisis surrounded byy a sleeve 78 which `unitesthe planet fpinions gand hand which is sur-v rounded bythe ends of the connecting rods 70 and 71. The sun'wheels m and n are overhung as it were within 'the crank so that these as kwell as the planet pinions have each but a single ball bearing 72.

The construction shown in Fig. 3 is closely analogous to that of Fig. 1 save that the crank proper is formed `as in Fig. 2 by two single disks7 5, 7 6. The planetpinions g and 7L are placed outside the crank. Inthis arrangement it is impossible to havea pinion on thecrank shaft for driving'the lay` shaft unless the crank shaft is carried right through beyond thesurrounding sleeve.y In-V steadtherefore," one of the crank is machine, the armature being keyedto shaft e. 1 is the field and c the armature of ani other dynamo electric machine of which the be rendered inoperative.

formed'as a gearing member, its periphery being vprovided withl spur vor other teeth as'at 79. y

In Fig. Ll, 1 indicates a prime motor vserving to drive'the crank shaft a. g is thefield and b the armature of a dynamo electric armature is keyed to shaft ci. p, p are clutch parts corresponding to the clutch parts90 of Y Fig. 1 by Which the gearingv g, l1., m, mfmay connected to theroad Wheels for instance through gearing indicated at 22 andthefload i shaft 23. In this figure the parts are letparts p are not actually onthe same parts tered tocorrespond with my previousPatent No. 948,436,9and itv will beV readily un derstood that the? functions performed by the separate elements are, the'same'as described in that earlier patent. -The clutch but that is imr'r'iaterial to their action. The actionof this mechanism as described in the Vearlier patent referred to is as follows: On starting the prime motor 1 the magnets gj areleft runexcited5consequently, the ref-l sistance to the motion of the vehicle holding the sunl Wheel/'n stationary, the rotation' of theV shaft a, communicated through fthe planet pinions, sets the Wheel/m and armature b inrotation. The vfield gis then gradually lexcited-,and thecurrent generated in the armature 'b` is led into the armature c,

the .eldvr of Which'uis yfully excited.Y 'IWof causes` then combine' to set the vehicleV Y Wheels in motion; the current in the armature b sets up atorque tending to stopthe rotation of thegear Wheel 71 and thisv torque isftransmitted through the gear Wheels hg, Wahn to the shaftid; Aand'also this current flowing intoV the armature c setsup a torque Y betweenv the armatures and its strong eld Y 7', which .is directlyy communicated to th`e shaft d. As the vehicle-gains speedjaback electrornotive forceis setup in the armature ...c which tends to'stop theV current yflovving from the armature b; to lessen this action,

the eldris graduallydiminished. f By this.

means a conditionis reached iin which' the armature Z; Y is rotating quite slowly vn a I 'n strong eld, but at a sufcient speed to main-l `tain sucha current as Will produce by reaction on the field 1, thetorquenecessary lto balance thattransmitted from they engine.y

l f After. thelfield'g has beenbroughtto its full strength andthe field 1' diminished to zero, itis vpossible-to proceedfurther by reversing 'the field-r, so'that the machine Vc r operates-"as ageneratorand supplies'current f tothe machine b gfworkingasfalmotor. y As a result, this latter :machine'now rotates in the same" direction as the Vengine shaft 0;, and

, the Ygradual,strengthening Vo f the field rf this `action may beincreased'until the arma- Shaftcl is also ture b' rotates at the same speed as the shaft*` a. VIn this .condition the Whole of thegear-Q ing Will be rotated-'solidly and the two .shafts a, d, and e. will have the same speed 1n the L same direction. At this stage therefore,the

clutch p may be engagedso that the Whole transmission becomes mechanical'thus giv-v ing a purely mechanical drive on the top i. i

speed. v f f In precisely similar fashion the parts lettered in Fig. 5 correspond in function with those similarly lettered inf myvprevious Pat- I ent No. 968,290.'Y The prime'motor 1 there,

drives shaft 2 which-has upon it the armature 18 of a'dynamo electricmachine 18, 19.

.807 Through the pinions 5, 7, the crankshaft .e y2 isV connected With shaft l10n Whichfis ,l i secured the armature 12 of a dynamo elecfl tricmachine 12, 13. Pinions 4 andl 6' con'-` previous application referred' to, serve Yas ing 4:, 5, 6, 7 inoperative.

ofthe apparatus of the firstpatent up toa certainpoint, viz. to the point when the machine@ r ofthe older arrangementfis to i `changeits function. At this stagelinj the Y, present case the machine 18, 19 is substi# tuted fforfthe machine 9, 10, the machiney 9, 104 being put on open circuit ,or otherwise'` The speed increase is'vg Y. effective-in the corresponding manner by in? l* rendered inactive.

creasing the eld Y19 until the4 shafts YSand 11 attain a common speed.V If desired-of' A105 course this speed may be exceeded .(the v clutch'part 16,;17 being `left disengaged)'-bA- *"f decreasing the field 13. In both cases itywi 1 4;. be understood that the necessary control y.

operations above set. out are effected by suitable con'trolappa'ratus, indicated diagramVA` matically 'at 20, as fullyV described in the" patents referred to, towhich ,the respective. i electricalfmembers `are joined through con-Y' 115 nections2l. Fromthese two examples it will be readily understood how the gearin transmission systems.V Y What/I claimlisz-f 'y i .Y Y YQ vehicle the combina` may be applied to similar electromechanica Y i n 1. YI ja motor4 .driven tionY of a prime motor, 'a' crank shaft driven" thereby, shafts concentric with said crank' l shaft, pinionsv on the 'crank, 'pinionsl onjthej othershafts..respectively intermeshingthere i with, dynamo electrcmachines on'rtwo ofy necting saidmachines electrically. Y v.,.

2. .Iny a motorfdriven' vehicle .the combina! Y -tlon cfa prime motor, Va" crank shaft driven-1s: l 1'80 thek threefshaftaandmeans operatively cofn i thereby, shafts concentric `vvith said fcranlr 25 'mission,system, thecombination with two y electricallyinterconnected dynamo electrick 1nachines,`one joined to the load, and al `prime motor driving a crankshaft, of a shaft, pinions Von the crank, pinions on the concentric shafts respectively intermeshing therewith, Adynamo electric machines on said concentric shafts, and 'means operatively connectingy said machines electrically.

3. Ina power transmission'system, the

' `f` Vcombination with afprime motor, of a crank il 'lfshaft' 'driven thereby, a load shaft, an electrical machineV connected with; said load 10 shaft-coaxial with the crank shaft, av second electrical Ymachine co-aXial with the crank A- shaft, means electrically-'1 interconnecting said machines, pinions attached to said machines,` and vintermeshing pinions upon the crank.. 4. In anKV electromechanical power transmission system,Y the combination` with a primemoton'of a crankshaft with hollow cranks, electrically interconnected dynamo electric;V machines co-aXial with the crank shaft, pinions upon thev crank pin within Vfsaid hollowcranks andintermeshing pinions attached to said machines. ,f

v5.' In an velectromechanical power transgear interconnectingsaid prime motor and dynamo `electric machines, comprising pin-` copis 'of'this patent may be obtained for ions upon the crank pin, 'andintermeshing pinionsco-axial with the crank shaft.

Y 6. In an electromechanical powertransmission system, the combination with a prime motor of a hollow crank shaft withhollow cranks joined` by a sleeve, of a crank pin spindle within said sleeve, pinions thereon withinrthe hollow cranks, `shafts eXtending within the hollow crank shaft, pinions .on said shafts intermeshing with thevpinions on the crank pin, .and electrically interconnected dynamo electric machines upon said bearing pinions, intermeshing pinions upon l the crank pin, electrically interconnected dynamo electric machines upon said concentric shafts, a clutch member upon the crank shaft, andl a co-acting clutch member upon oneof said concentric shafts e y l In testimony whereof Ifhavesigned my name to this specification in the presence of two subscribing witnesses.

Witnesses:

VKEMP THOMSON,

A. E. ODELL.

ve c'entsca'cmhby addressing the Commissioner of Eatentl, Washington, D. C."

JOHN GoDrREr maar THOMAS. 'e 

